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mirror of https://github.com/primer/css.git synced 2024-12-27 08:05:06 +03:00
css/script/bundle-size-report.js
2021-04-10 13:53:25 -07:00

114 lines
2.9 KiB
JavaScript
Executable File

#!/usr/bin/env node
const {join} = require('path')
const filesize = require('filesize')
const {table} = require('table')
// ensure that K and B values line up vertically
const filesizeConfig = {symbols: {KB: 'K'}}
const prettySize = bytes => filesize(bytes, filesizeConfig)
function getBundles(path) {
const meta = require(join(path, './dist/meta.json'))
let metaBundles = Object.values(meta.bundles)
// fitler out support bundles, since they don't generate CSS
metaBundles = metaBundles.filter(bundle => !isSupportBundleName(bundle.name))
const bundles = {}
for (const bundle of metaBundles) {
const entry = {
name: bundle.name,
path: bundle.css,
stats: require(join(path, `./${bundle.stats}`))
}
bundles[bundle.name] = entry
}
return bundles
}
const tableOptions = {
singleLine: true,
border: {
topBody: '',
topJoin: '',
topLeft: '',
topRight: '',
bottomBody: '',
bottomJoin: '',
bottomLeft: '',
bottomRight: '',
bodyLeft: '|',
bodyRight: '|',
bodyJoin: '|',
joinBody: '',
joinLeft: '',
joinRight: '',
joinJoin: ''
}
}
// const sortByName = (a, b) => (a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
const sortByGZipSize = (a, b) => b[3] - a[3]
// const sortByRawSize = (a, b) => b[5] - a[5]
const posNeg = v => (v > 0 ? '+ ' : v < 0 ? '- ' : '')
;(async () => {
const currentBundles = getBundles(join(__dirname, '../'))
const latestBundles = getBundles(join(__dirname, '../tmp/node_modules/@primer/css/'))
let data = []
// Build the rows
for (const name of Object.keys(currentBundles)) {
const current = currentBundles[name]
const latest = latestBundles[name]
const delta = [
current.stats.selectors.total - latest.stats.selectors.total,
current.stats.gzipSize - latest.stats.gzipSize,
current.stats.size - latest.stats.size
].reduce((a, b) => a + b, 0)
if (delta !== 0) {
data.push([
current.name,
current.stats.selectors.total,
current.stats.selectors.total - latest.stats.selectors.total,
current.stats.gzipSize,
current.stats.gzipSize - latest.stats.gzipSize,
current.stats.size,
current.stats.size - latest.stats.size
])
}
}
// Sort the data
data = data.sort(sortByGZipSize)
// Beautify the data
data = data.map(row => {
row[2] = posNeg(row[2]) + `${row[2]}`.replace('-', '')
row[3] = prettySize(row[3])
row[4] = posNeg(row[4]) + `${prettySize(row[4])}`.replace('-', '')
row[5] = prettySize(row[5])
row[6] = posNeg(row[6]) + `${prettySize(row[6])}`.replace('-', '')
return row
})
// Adding header
data = [
['name', 'selectors', '±', 'gzip size', '±', 'raw size', '±'],
[':-', '-:', '-:', '-:', '-:', '-:', '-:']
].concat(data)
console.log(table(data, tableOptions))
})()
function isSupportBundleName(bundleName) {
// "support", "marketing-support", and any future ones?
return bundleName.endsWith('support')
}